Bicycle helmet



FIG. 1 is a left side perspective view of my design for a bicycle helmet.

FIG. 2 is a bottom perspective view of FIG. 1.

FIG. 3 is a left side elevation view of FIG. 1; the right side elevation view being a mirror image of the left side.

FIG. 4 is a front elevation view of FIG. 1.

FIG. 5 is a back elevation view of FIG. 1.

FIG. 6 is a top plan view of FIG. 1; and,

FIG. 7 is a bottom plan view of FIG. 1.

The broken lines represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a bicycle helmet, as shown and described. 